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Development of a vibration-powered wireless temperature sensor and accelerometer for health monitoring

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1 Author(s)
George, S. ; RLW, Inc., State College, PA

This paper describes and evaluates the continued development of a prototype vibration-powered, wireless sensor for use in condition based maintenance (CBM) applications. To reduce installation and maintenance costs, the CBM industry is turning interest increasingly toward wireless, self-powered sensors, but a major impediment to more widespread implementation has been a lack of sensors that can scavenge enough energy to operate as well as their battery or wall-powered equivalents. The sensor described in this paper solves that problem by implementing low-power electronics and improved energy scavenging technology. Developed by RLW, Inc. of State College, PA, the S5 NAPtrade sensor runs off power scavenged from the ambient vibrations of the platform to which it is attached. It acquires temperature and acceleration measurements and communicates them wirelessly via a radio. It runs indefinitely, reporting its temperature and acceleration every fifteen minutes, if vibration levels of the machine to which it is mounted are 0.065 g RMS or greater at the internal generator's resonant frequency (50 and 60 Hz described in this testing). Upon cessation of input vibration energy for power, the S5NAPtrade uses up remaining available energy before going to sleep until energy is again available at a future time

Published in:

Aerospace Conference, 2006 IEEE

Date of Conference:

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